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Julia mixin macros. Mixed, not stirred

License: Other

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mixers.jl's Issues

How about mixing functions?

This is a neat idea to copy fields from one type to another. Is there a convenient way to do the same for functions?

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@mix doesn't work with module qualified macros

MWE:

using Mixers

@mix Base.@kwdef struct Foo
    bar = 1
end

fails with error:

ERROR: LoadError: MethodError: Cannot `convert` an object of type Expr to an object of type Symbol
Closest candidates are:
  convert(::Type{T}, ::T) where T at essentials.jl:205
  Symbol(::Any...) at strings/basic.jl:229
Stacktrace:
  [1] push!(a::Vector{Symbol}, item::Expr)
    @ Base ./array.jl:932
  [2] chained_macros!(macros::Vector{Symbol}, ex::Expr)
    @ Mixers ~/.julia/packages/Mixers/f3AVv/src/Mixers.jl:87
  [3] chained_macros
    @ ~/.julia/packages/Mixers/f3AVv/src/Mixers.jl:83 [inlined]
  [4] defmacro(ex::Expr, prepend::Bool)
    @ Mixers ~/.julia/packages/Mixers/f3AVv/src/Mixers.jl:37
  [5] var"@mix"(__source__::LineNumberNode, __module__::Module, ex::Any)
    @ Mixers ~/.julia/packages/Mixers/f3AVv/src/Mixers.jl:24
  [6] eval
    @ ./boot.jl:360 [inlined]
  [7] eval
    @ ./Base.jl:39 [inlined]
  [8] repleval(m::Module, code::Expr, #unused#::String)
    @ VSCodeServer ~/.vscode/extensions/julialang.language-julia-1.5.11/scripts/packages/VSCodeServer/src/repl.jl:157
  [9] (::VSCodeServer.var"#69#71"{Module, Expr, REPL.LineEditREPL, REPL.LineEdit.Prompt})()
    @ VSCodeServer ~/.vscode/extensions/julialang.language-julia-1.5.11/scripts/packages/VSCodeServer/src/repl.jl:123
 [10] with_logstate(f::Function, logstate::Any)
    @ Base.CoreLogging ./logging.jl:491
 [11] with_logger
    @ ./logging.jl:603 [inlined]
 [12] (::VSCodeServer.var"#68#70"{Module, Expr, REPL.LineEditREPL, REPL.LineEdit.Prompt})()
    @ VSCodeServer ~/.vscode/extensions/julialang.language-julia-1.5.11/scripts/packages/VSCodeServer/src/repl.jl:124
 [13] #invokelatest#2
    @ ./essentials.jl:708 [inlined]
 [14] invokelatest(::Any)
    @ Base ./essentials.jl:706
 [15] macro expansion
    @ ~/.vscode/extensions/julialang.language-julia-1.5.11/scripts/packages/VSCodeServer/src/eval.jl:34 [inlined]
 [16] (::VSCodeServer.var"#53#54")()
    @ VSCodeServer ./task.jl:411
in expression starting at REPL[10]:1

but

using Mixers
using Base: @kwdef

@mix @kwdef struct Foo
    bar = 1
end

works fine.

Mixers v0.1.1 on:

julia> versioninfo()
Julia Version 1.6.5
Commit 9058264a69 (2021-12-19 12:30 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
  CPU: Intel(R) Core(TM) i5-8265U CPU @ 1.60GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-11.0.1 (ORCJIT, skylake)
Environment:
  JULIA_EDITOR = code
  JULIA_NUM_THREADS = 4

Could @Premix and @mix be linked to an abstract type?

Someithing like:

abstract type Drink

@premix @with_kw struct Fruitjuice{P,B}     {link to Drink}
    pommegranite::P
    orange::B
end

@mix @with_kw struct Soda{J}                {link to Drink}
    soda::J = 2u"L"
end

So that

struct Punch{L} <: Drink
    vodka::L
end

would be equivalent to

@Fruitjuice @Soda struct Punch{L} 
    vodka::L
end

Sorry If I've misunderstood the proper usage.

Generate mix or premix from existing (mixed) structs?

First, great package, thanks for that!

Is there any fancy way to use @mix or @premix on existing mixed structs? I need a bit more nested levels...

Here is a non-working dummy example:

@premix struct FooTemplate
    x
end

@FooTemplate struct Bar
    y
end

# now create a @BarTemplate which contains both x and y 

@premix BarTemplate Bar   # this will of course not work

@BarTemplate Baz
    z
end

So that Baz now has the fields x, y and z.

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